CN105870998B - A kind of rectification module dormancy control method of transformer station direct current system - Google Patents
A kind of rectification module dormancy control method of transformer station direct current system Download PDFInfo
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- CN105870998B CN105870998B CN201610210716.3A CN201610210716A CN105870998B CN 105870998 B CN105870998 B CN 105870998B CN 201610210716 A CN201610210716 A CN 201610210716A CN 105870998 B CN105870998 B CN 105870998B
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- 230000005059 dormancy Effects 0.000 title claims abstract description 33
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- 238000007667 floating Methods 0.000 claims abstract description 60
- 230000005611 electricity Effects 0.000 claims description 29
- 238000005070 sampling Methods 0.000 description 18
- 238000012544 monitoring process Methods 0.000 description 16
- 238000004891 communication Methods 0.000 description 7
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- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J11/00—Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of rectification module dormancy control method of transformer station direct current system, which includes：The step of charged state of battery module is detected；When the charged state of battery module is floating charge state, the step of according to suspend mode number of units of the direct current output value of the mode of connection, minimum operation number of units and every group of rectification module to determine every group of rectification module；The step of every group of rectification module is subjected to suspend mode in turn according to determining number of units；And the step of rectification module exits suspend mode is controlled when floating charge state exits or is disturbed.Transformer station direct current system and its dormancy control method according to the present invention, accumulator realizes the control of suspend mode in turn of rectification module only under floating charge state, floating charge state exits or is interfered, and exits suspend mode control, it so ensure that the needs of safe power supply, and the number of units of the rectification module of suspend mode is determined according to the load factor that direct current output value converts so that the load factor of rectification module is promoted.
Description
Technical field
The present invention relates to a kind of rectification module dormancy control methods of transformer station direct current system.
Background technology
Transformer station direct current system provides power supply for station controlling system, relay protection, signal device, automatic device, in thing
It remains to keep its power supply in the case of therefore, the loads such as emergency lighting, inverter can also be supplied, to substation safety stable operation
There is irreplaceable role.
Rectification module completes AC/DC transformation as a wherein important ring in straight-flow system, to charge the battery, and
Various load supplyings are filled, realize the most basic function of system.
Currently, transformer station direct current system includes " the two electricity two fill " mode of connection and " two electricity three fill " mode of connection.
" two electricity two fill " mode of connection is to configure two sets of charging units, each battery and its charging dress by two group storage batteries
It sets and is respectively connected to corresponding bus section, busbar section, the DC power system of two group storage batteries should meet two sections of busbar switchings in normal operation
When uninterrupted power supply requirement.Certain 220kV second transformer station direct current system situation is as follows：Two groups of rated capacities of system configuration are
It is in parallel by four 220V/20A rectification modules often to cover charging unit for the maintenance-free lead accumulator of 300Ah and two sets of charging units.
When normal operation, for every section of feeder load about in 10A or so, battery floating charge stream is about 0.3A or so.
" two electricity three fill " mode of connection is by two group storage batteries, two sets of float chargers and a set of standby charging unit structure
At being the common mode of 220kV and the above substation.Each battery and floating charge electric equipment are respectively connected to different bus section, busbar sections,
Charging equipment can charge to two group storage batteries through switching device.Certain 220kV first transformer station direct current system situation is as follows：System
Two groups of 300Ah maintenance-free lead accumulators groups and three sets of charging units are configured, often cover charging unit by three 220V/20A rectifications
Wired in parallel,.When normal operation, regular load 15A of every section of feeder line or so, battery floating charge stream is about 0.3A.
Above two electricity three fills, two electricity two fill the mode of connection all rectification modules of charging unit in normal operation and all open
It is dynamic, to ensure safety, however whole group apparatus of load rate it is low (two electricity three, which are filled, to be filled less than 30%, two electricity two less than 15%), module from
The shared ratio of body loss is great, and hidden danger is more：
1, poor, some module no-load running of current sharing energy of rectification module, some module overload overheats be easy to cause damage
Bad alarm, service life are inconsistent；
2, when a module damage system excision whole group module AC power, come with whole station load by accumulator group,
If accumulator group runs year limit for length, battery group capacity is low, then is difficult to meet site requirement；
3, fault-signal could be sent out by DC monitoring system after rectification module failure, can not given warning in advance.
Invention content
The present invention also aims to provide a kind of rectification module dormancy control method of transformer station direct current system, to protect
The load factor of rectification module is promoted on the basis of card safe power supply.
For this purpose, the present invention provides a kind of rectification module dormancy control method of transformer station direct current system, including following step
Suddenly：The step of charged state of battery module is detected；When the charged state of battery module is floating charge state, root
The suspend mode number of units of every group of rectification module is determined according to the direct current output value of the mode of connection, minimum operation number of units and every group of rectification module
The step of；The step of every group of rectification module is subjected to suspend mode in turn according to determining number of units；And exit in floating charge state or
It detects and controls the step of rectification module exits suspend mode when the disturbed condition of floating charge state.
Further, the above-mentioned direct current output value according to every group of rectification module determines the suspend mode number of units of every group of rectification module
Step meets：After determining the rectification module suspend mode of number of units, the fairing to work in every group of fairing is in Optimal load coefficient
Work in range.
Further, the above-mentioned suspend mode number of units that every group of rectification module is determined according to the direct current output value of every group of rectification module
The step of further include setting dormancy parameter, setting dormancy parameter include setting shutdown threshold value and booting threshold value, wherein shutdown threshold value
Refer to the corresponding direct current output value of the controlled progress suspend mode of rectification module, booting threshold value, which refers to that rectification module is controlled, exits suspend mode correspondence
Direct current output value.
Further, the above-mentioned mode of connection is that two electricity three fill the mode of connection, and the number of units of every group of rectification module is three, minimum
It is two to run number of units, if being less than shutdown threshold value according to the direct current output value of every group of rectification module, controls and starts a rectification
Module suspend mode.
Further, the above-mentioned mode of connection is that two electricity two fill the mode of connection, and the number of units of every group of rectification module is four, minimum
It is two to run number of units, determines that the number of units of the rectification module of suspend mode is one or two, if the direct current output of every group of rectification module
Value is less than shutdown threshold value, then controls one or two rectification module suspend mode.
Further, above-mentioned shutdown threshold value is the direct current output corresponding to the load factor 30%~40% of every group of rectification module
Value, booting threshold value are the direct current output value corresponding to the load factor 70~80% of every group of rectification module.
Further, the disturbed condition of above-mentioned floating charge state includes：Rectification module failure, interconnection switch combined floodgate, suspend mode hand
It is dynamic to close, exchange switch unit exception and direct current output value beyond booting threshold value and predetermined hold-time, predetermined time 1
~5 minutes.
Further, above-mentioned in the step of every group of rectification module is carried out suspend mode in turn according to determining number of units, suspend mode
Rectification module time-delay closing, delay time be 1~5 minute.
Further, above-mentioned rectification module dormancy control method further includes according to the direct current output value detected in real time to rectification
The step of suspend mode number of units of device is adjusted.
Further, the condition that above-mentioned floating charge state exits includes when quick condition is timed to and accumulator fills state.
The rectification module dormancy control method of transformer station direct current system according to the present invention, accumulator is only under floating charge state
Realize the control of suspend mode in turn of rectification module, floating charge state exits or floating charge state is interfered, and exits suspend mode control, such as
This ensure that the needs of safe power supply, and the load factor that the number of units of the rectification module of suspend mode converts according to direct current output value
It is determined so that the load factor of rectification module is promoted.
Other than objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is described in further detail.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram of transformer station direct current system according to the present invention；
Fig. 2 is the structure diagram of the high-frequency digital Switching Power Supply of transformer station direct current system according to the present invention；
Fig. 3 is the flow chart of the rectification module dormancy control method of transformer station direct current system according to the present invention；
Fig. 4 is a preferred embodiment of the rectification module dormancy control method of transformer station direct current system according to the present invention
Flow chart；And
Fig. 5 is the another excellent of the flow chart of the rectification module dormancy control method of transformer station direct current system according to the present invention
Select the flow chart of embodiment.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1 is the structure diagram of transformer station direct current system according to the present invention.As shown in Figure 1, the transformer station direct current system
Including PLC monitoring units 1, exchange switch unit 2, more rectification modules 3, direct current output sampling apparatus 4, battery module 5, store
Battery sampling device 6, regulator 7, control bus (KM1, KM2) 8 and control bus sampling apparatus 9.
Exchange switch unit from two ac power supply lines L1, L2 for selecting a selection one for supplying more rectifications
Module.
More rectification modules are divided into two groups or three groups, and in Fig. 1, more rectification modules are divided into two groups, every group of rectification module
Using 4 rectification modules in parallel.More rectification modules are connect by RS485 buses with PLC monitor cell signals.
In the present invention, which is high-frequency digital Switching Power Supply, as shown in Fig. 2, becoming including input circuit, power
Change circuit, output circuit, control circuit, wherein input circuit is mainly by EMI filter circuit, pfc circuit and rectification circuit group
At power conversion circuit is mainly made of inverter circuit and high frequency transformer, and output circuit is mainly by rectification circuit, filtered electrical
Road, output EMI circuits composition, control circuit is mainly by pwm control circuit, flow equalizing circuit, protection circuit, auxiliary power circuit etc.
Composition, and work under micro-control unit (MCU) control.
DC/AC inversions and high frequency become appliance circuit as core circuit portions in rectification module, and inverter circuit uses full-control type
Device for power switching, such as GTR, MOSFET, IGBT, and different topological structures can be selected, it is common to have forward converter, flyback
Circuit, half-bridge circuit, full-bridge circuit, push-pull circuit etc..
Exchange input carries out lightning protection processing and EMI (electromagnetic interference) filtering first, and then rectified and passive PFC is (passive
PFC) be converted into direct current, then after DC/AC circuit conversions are at high-frequency ac, by high frequency transformer every with it is whole
Flow the output direct current such as filtering, EMI Filtering circuit, anti-reverse protective loop.
Control bus KM1, KM2 are connected for the branched feeder line of feeder line 1 to feeder line n, and electricity is taken from control bus.
PLC monitoring units are additionally operable to the suspend mode control of rectification module in the present invention, are examined according to direct current output sampling apparatus
The charging signals of direct current output value and accumulator the sampler detection of survey control the suspend mode of rectification module.Specifically, PLC is supervised
The charging signals that control unit is used to be provided according to accumulator sampling apparatus judge the charged state of battery module, if sentencing
When being set to floating charge state, then according to direct current output sampling apparatus provide direct current output value control setting number of units rectification module into
Row in turn suspend mode so that work rectification module work in load factor setting range, and detect exit floating charge state or
Person detects that the rectification module that suspend mode is controlled when the disturbed condition of floating charge state exits suspend mode.
Touch screen 10 is connect by RS485 interfaces with PLC monitoring units, in the suspend mode control of the present invention, touches screen display
The various information for showing straight-flow system, such as commutation system, accumulator, control bus voltage, current parameters, system switching state letter
Breath, fault condition etc., and for each dormancy parameter to be arranged.Touch screen passes through RS485 communication interfaces and complex automatic system 11
Communication.
Transformer station direct current system according to the present invention, accumulator realize the suspend mode in turn of rectification module only under floating charge state
Control, exits floating charge state or floating charge state is interfered, exit suspend mode control, so ensure that the needs of safe power supply,
And the number of units of the rectification module of suspend mode is determined according to the load factor that direct current output value converts so that rectification module
Load factor is promoted.
According to the first preferred embodiment of straight-flow system of the present invention, the mode of connection is filled using two electricity three, the straight-flow system packet
The 5th group of rectification module of the third group rectification module of 220V/20A, the 4th group of rectification module of 220V/20A, 220V/20A is included,
Direct current output sampling apparatus is respectively used to the direct current of the direct current output value and the 4th group of rectification module of detection third group rectification module
Output valve, PLC monitoring units control in third group rectification module according to the direct current output value of third group rectification module and set number of units
Rectification module carry out suspend mode so that work rectification module work in load factor setting range；PLC monitoring units are according to
The rectification module that the direct current output value of four groups of rectification modules controls setting number of units in the 4th group of rectification module carries out suspend mode so that work
The rectification module of work works in load factor setting range.
In the first preferred embodiment, direct current output sampling apparatus includes the first sampling apparatus and the second sampling apparatus, with
The direct current output value of the direct current output value and second group of rectification module of first group of rectification module is detected respectively.
In the first preferred embodiment, PLC monitoring units are first according to third group rectification module and the 4th group of rectification module
Direct current output value judges whether the load factor of every group of rectification module is less than the first setting value, from 3 if being less than the first setting value
Rectification module to be selected in 220V/20A rectification modules in turn and carries out suspend mode, the first setting value range of choice is 30%~
40%.
According to the second preferred embodiment of straight-flow system of the present invention, the preferred of the straight-flow system of the mode of connection is filled in two electricity two
In embodiment, include second group of rectification module of first group of rectification module of 4 220V/20A, 4 220V/20A, accumulator mould
Block includes two group storage batteries (every group of 300Ah), and above-mentioned two electricity two fills the straight-flow system direct current output sampling apparatus point of the mode of connection
Other to be sampled respectively to the direct current output value of first group of rectification module and the direct current output value of second group of rectification module, PLC monitoring is single
The rectification module that member controls setting number of units in first group of rectification module according to the direct current output value of first group of rectification module is taken turns
Stream suspend mode is so that the rectification module of work works in load factor setting range；PLC monitoring units are used for according to second group of rectification
Rectification module that the direct current output value of module controls setting number of units in second group of rectification module carries out suspend mode in turn so that work
Rectification module works in load factor setting range.
In the second preferred embodiments, direct current output sampling apparatus includes third sampling apparatus and the 4th sampling apparatus, with
The direct current output value of the direct current output value and the 4th group of rectification module of detection third group rectification module respectively.
In the second preferred embodiments, PLC monitoring units are first according to first group of rectification module and second group of rectification module
Direct current output value judges respective load factor, and one is selected in turn from 4 rectification modules if load factor is less than the second setting value
Platform rectification module carries out suspend mode, and two rectification moulds are selected in turn from 4 rectification modules if load factor is less than third setting value
Block carries out suspend mode, and the second setting value range of choice is 50%~60%, and third setting value range of choice is 40%~30%.
PLC monitoring units preferably use SIEMENS S 7-200 PLC, S7-200 to have two-way RS-485 interfaces, all the way interface
With 8 number of units word high-frequency rectification module communications, 485 buses are constituted, using Modbus RTU stipulations, verification calculation procedure is in S7-200
Middle programming.Another way RS-485 interfaces connect touch screen, and touch screen is logical by RS485 communication interfaces and complex automatic system
News.
Fig. 3 is the flow chart of the rectification module dormancy control method of transformer station direct current system according to the present invention.Such as Fig. 3 institutes
Show, the dormancy control method of rectification module of the invention includes the following steps：The charged state of battery module is detected
Step S01；When charged state is floating charge state, according to the mode of connection, minimum operation number of units and obtained rectification is detected
The direct current output value of module determines the step S03 of the number of units of the rectification module of suspend mode；Control determines the rectification module wheel of number of units
Stream carries out the step S05 of suspend mode；And the disturbed condition control suspend mode of floating charge state is exited or detected according to floating charge state
Rectification module exit the step S07 of suspend mode.
Wherein, the detection carried out to the charged state of battery module is fed back by law of electric charges and accumulator sampling unit
Both sampling values determine.
About when charged state is floating charge state, obtained according to the mode of connection, minimum operation number of units and detection whole
It the step of number of units of the direct current output value of flow module to determine the rectification module of suspend mode, is exemplified below：
If the mode of connection, which is two electricity three, fills the mode of connection, every group of rectification module has 3 rectification modules, every group of rectification module
Minimum operation number of units is defined as 2, then the number of units of the rectification module of suspend mode is 1, judges every group of rectification according to direct current output value
The load factor of module starts suspend mode when being less than the first setting value, the first setting value range of choice is 30%~40%.Such as rectification
The best effort range of module is between load factor 40% to 80%, if the whole group rectification mould being calculated by direct current output value
The load factor of block is less than 40%, then one rectification module of suspend mode, the direct current output value are also referred to as shutdown threshold value.
The mode of connection is filled if the mode of connection is two electricity two, the minimum operation number of units of every group of rectification module is 2, determines suspend mode
Rectification module number of units be 1 or 2, the load factor of every group of rectification module is judged according to direct current output value, if be less than second
Start a rectification module suspend mode when setting value, if starting two rectification module suspend mode when less than third setting value, the second setting
It is 50%~60% to be worth range of choice, and third setting value range of choice is 40%~30%.
Control determines the rectification module suspend mode in turn of number of units, and benefit is that the operating time of every rectification module is allowed to tend to one
It causes, to there is essentially identical service life.
It is exited according to floating charge state or the rectification module of the disturbed condition of floating charge state control suspend mode exits suspend mode,
In, floating charge state exits the when of being timed to including floating charge state, accumulator fills；The disturbed condition of floating charge state includes rectification mould
Block failure, interconnection switch close a floodgate, suspend mode is turned off manually, exchanging switch unit, abnormal and direct current output value exceeds booting threshold value
And predetermined hold-time.These can be judged by PLC according to each sampling unit feedack.
The rectification module dormancy control method of transformer station direct current system according to the present invention, battery module is only in floating charge shape
The control of suspend mode in turn that rectification module is realized under state, exits floating charge state or floating charge state is interfered, exit suspend mode control
System, so ensure that the needs of safe power supply, and the number of units of the rectification module of suspend mode converts according to direct current output value
Load factor is determined so that the load factor of rectification module is promoted.
Fig. 4 is a preferred embodiment of the rectification module dormancy control method of transformer station direct current system according to the present invention
Flow chart.As shown in figure 4, including the following steps：Detect the step S11 of the charged state of battery module；Judge accumulator mould
Whether block is in the step S13 of floating charge state；Start the step S15 of sleep mode, and has been assisted by touch screen parameter setting
At step S17；Determine the step S19 of the number of units of the rectification module of suspend mode；Control determines that the rectification module of number of units carries out in turn
The step S21 of suspend mode；Whether floating charge state exit or floating charge state be interfered step S23 is detected；If so, executing control
The rectification module of suspend mode processed exits the step S25 of suspend mode；If it is not, the step S22 of examinations direct current output value is executed, with again
Determine the number of units of the rectification module of suspend mode.
About step S11, to selecting what the detection of the charged state of battery module can be provided by accumulator sampling apparatus to fill
Electric signal, and combined charge rule determines.
The law of electric charges of straight-flow system is as follows：When primary charging, charging equipment is with accumulator 10h discharge rate electric currents
(0.1CA) carries out constant current to accumulator and fills, when voltage reaches setting valve (2.35 × n, n are accumulator group joint number), charging side
Formula is converted into constant pressure charge mode；With the gradual saturation of accumulator, charging current is gradually reduced, when reaching setting value (such as
When 0.06CA), continues constant pressure and fill 3 hours, be converted into floating charge mode, (2.25 × n, n are accumulator with lower constant voltage
Group joint number) it charges to accumulator group.During the normal floating charging operation of transformer station direct current system, every 720 hours, it is transferred to one
Secondary constant-current charge state operation, effectively activates accumulator.
Directly whether can judge accumulator on the basis of detecting the charged state of battery module about step S13
In floating charge state.
About step S15, which allows operating personnel to choose whether to start dormancy control method, which is joined by touch screen
The step S17 auxiliary of number setting is completed, for setting parameter for example the mode of connection, minimum operation number of units, start suspend mode when
The threshold value of direct current output value.
About step S19, the step is according to the mode of connection, minimum operation number of units and detects obtained rectification module
Direct current output value determines the number of units of the rectification module of suspend mode, such as two electricity three fill the mode of connection, every group of rectification module it is minimum
It is 2 to run number of units, determines that the number of units of the rectification module of suspend mode is 1, and the shutdown threshold value of direct current output value is 48A.Such as two
Electricity two fills the mode of connection, and the minimum operation number of units of every group of rectification module is 2, determines that the number of units of the rectification module of suspend mode is 1
Or 2, the shutdown threshold value of direct current output value is 36A.Suspend mode control is carried out if direct current output value is less than shutdown threshold value.
About step S21, which allows the suspend mode in turn of every rectification module, and each rectification module can be made to have the service life consistent
Property.
About step S22, which is measured in real time the direct current output value of every group of rectification module, to determine suspend mode
The number of units of rectification module provides the control means of modification suspend mode number of units in this step.It is applied and fills wiring in two electricity two
In the straight-flow system of mode, it will further increase control efficiency.Specifically, such as every at the beginning group of rectification module suspend mode one
Rectification module, with the stable operation of system, every group of rectification module can two rectification modules of suspend mode, to improve straight-flow system
Operational efficiency, the step allow to adjust suspend mode number of units in real time according to load, solve raising and the safety drop of control efficiency
Contradiction between low.
About step S23, in this step, the disturbed condition of floating charge state includes：Rectification module failure, interconnection switch close
Lock, suspend mode are turned off manually and exchange switch unit exception.Wherein, floating charge state is determined by the law of electric charges of straight-flow system, example
Such as 720 hours, floating charge state is exited if being spaced 720 hours.Rectification module failure can pass through RS-485 buses by rectification module
Feed back to PLC monitoring units.It is typical floating charge shape that interconnection switch combined floodgate, which is turned off manually with suspend mode and exchanges switch unit extremely,
The criterion that state is interfered.
About step S25, detecting that floating charge state exits or after by the disturbed condition of floating charge state, be immediately performed the step
Suddenly.
According to the rectification module dormancy control method of this preferred embodiment, battery module is only realized under floating charge state whole
The suspend mode in turn of flow module controls, and exits floating charge state or floating charge state is interfered, exit suspend mode control, so ensure that
The needs of safe power supply, and the number of units of the rectification module of suspend mode carries out really according to the load factor that direct current output value converts
It is fixed so that the load factor of rectification module is promoted.
Fig. 5 is the another excellent of the flow chart of the rectification module dormancy control method of transformer station direct current system according to the present invention
Select the flow chart of embodiment.Particularly suitable two electricity of the dormancy control method three fills the mode of connection, includes the following steps：Accumulator fills
The step S31 of electricity condition detection；Judge whether the step S33 into floating charge state；Start the step S35 of sleep mode, the step
Suddenly it is completed by the step S37 auxiliary of touch screen parameter setting；Next judge whether direct current output value is less than the step of shutdown threshold value
Rapid S39；If then selecting the step S41 of three suspend mode of rectification module one, rectification module two and rectification module in turn；Suspend mode delay is opened
Dynamic step S43；Next judge the step S45 whether floating charge state exits；And it is then executed if it is determined that exiting floating charge state
The module of suspend mode is set to exit the step S49 of suspend mode；And if it is determined that do not exit floating charge state, then continue whether to judge floating charge state
The step S47 being interfered；If so, thening follow the steps S49.Then continue to judge to be somebody's turn to do if it is determined that direct current output value is more than booting threshold value
Direct current output value whether the step S51 of predetermined hold-time；
Preferred embodiment as shown in fig. 4 is compared, and direct current output value is more than booting threshold value and continued by this preferred embodiment
One of the criterion that predetermined time is interfered as floating charge state, it is therefore prevented that the rectification module of suspend mode is frequently disturbed.Be switched on threshold
Being worth the lasting predetermined time may be set to 1 minute~5 minutes, be determined according to the characteristic of specific straight-flow system.
The threshold value determination method that is switched on is as follows：The best effort range of rectification module is between load factor 40% to 80%,
If the load factor of the rectification module for the whole group work being calculated by direct current output value is higher than 80%, make the rectification mould of suspend mode
Block wakes up work, the corresponding direct current output value also referred to as booting threshold value.Stopped as startup using booting threshold value and shutdown threshold value
It sleeps and exits the foundation of suspend mode, have suspend mode disturbance small, while the advantages of power supply safety.
Two electricity three fill the straight-flow system application example of the mode of connection：
Certain 220kV first substation charging unit rectification module passes through technological transformation, is changed to intelligent rectification module.Rectification module
Dormancy method is successfully applied to the station.First transformer station direct current system central monitoring unit man-machine interface uses the DOP- of Delta company
B touch screens, rectification module use the GF220-20 intelligent objects of Shenzhen Ying Kerui companies.Functional test is as follows：
1) data communication is examined：System can by monitoring device communication interface promptly and accurately receive every rectification module
Fault message, system automatic spring alarm screen, data are charged in historical data base while providing audible alarm；System can
The voltage and current telemetry intelligence (TELINT) for receiving every rectification module of fast and stable, and show that numerical value is consistent with module itself.
2) module switch machine Control experiment：According to load current size, when load is less than module always output 80%, automatically
Stop a module job, when load is more than 80%, module all starts；In whole group charging unit, wherein a charging mould
When block breaks down, module all starts；When the condition of filling reaches accumulator group, module all starts；Two groups of charging units,
One of which charging unit dead electricity, when interconnection switch is closed, another group of charging unit all starts.
3) database is examined：User can quickly and easily be checked by the operation button or menu of human-computer interaction interface
The operation data (historical data and real time data) of system equipment, it is easy to operate.
By actual measurement, separate unit rectification module no-load running power consumption about 350W ignores module and carries radiator fan energy consumption, uses
Two rectification module whole years can save the degree of electricity more than 6000, economic benefits after dormant technology.Charging dress can be extended simultaneously
Rectification module maintenance period is set, O＆M cost is reduced.
Two electricity two fill the straight-flow system application example of the mode of connection：
Certain 220kV second substation charging unit high frequency switch power is the new ability JIAN-MC22020 air cooling modules in Shenzhen,
The operation time limit is longer, and module is fragile, intelligent relatively low with reliability, which passes through technological transformation, and rectification module is replaced
For digital module, the HD220-20 air cooling modules of model Ai Mosheng companies.Second stands erectly streaming system man-machine interface using Delta public affairs
The DOP-B touch screens of department.By upgrading the control program of expansion technique of PLC and touch screen, the Hot Spare of rectification module is realized and at this
It stands application.Functional test is as follows：
1) digital ＆ analog signal is examined：Communication in monitoring system can be promptly and accurately receive every rectification module protection signal
(exchange over voltage, phase shortage export over voltage, the signals such as module excess temperature) and fault-signal are while providing audible alarm
System automatic spring alarm screen, data are charged in historical data base；What system was capable of fast and stable receives every rectification module
The telemetry intelligence (TELINT)s such as output voltage electric current, and show that numerical value is consistent with module itself.
2) remote control remote regulating experiment：According to the order of load current size and monitoring system, the machine open/close of control module ,/
Floating charge is converted.When load is less than module always output 40%, it is automatically stopped two module work and is opened when load is more than 60%
A dynamic wherein module, when load is more than 80%, module all starts；In whole group charging unit, wherein a charging module goes out
When existing failure, module all starts；When the condition of filling meets accumulator group, module all starts；Two groups of charging units, wherein
One group of charging unit dead electricity, when interconnection switch is closed, another group of charging unit whole module starts.According to the parameter of setting, prison
Control system can accurately adjust the output voltage and output current current-limiting points of rectification module.
3) graphical interfaces and database are examined：User can check rectification module by the touch key-press of human-computer interaction interface
Operating status simultaneously controls its parameter.Touch screen can correctly record dynamic data and store historical data.
A period of time is run under rectification module Hot Spare mode, finds obviously to change compared with the stream between underload lower module having
It is kind.Before not using Hot Spare mode, charging unit load factor 10%-20% is less efficient.By actual measurement, separate unit rectification module
Power consumption about 300W is run, if ignoring module carries radiator fan energy consumption, using two groups of charging units in standing after Hot Spare mode
Four module suspend mode operations, it is rough to estimate that whole year save the degree of electricity more than 10,000, economic benefits.It can extend rectification simultaneously
Module maintenance period reduces O＆M cost.
It should be pointed out that the PLC monitoring units in the various embodiments described above can be replaced by other monitoring devices such as microcontroller
Generation, above-mentioned touch screen can be substituted by other such as mobile phones of terminal device with parameter setting function.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of rectification module dormancy control method of transformer station direct current system, which is characterized in that include the following steps：
The step of charged state of battery module is detected；
It is whole according to the mode of connection, minimum operation number of units and every group when the charged state of the battery module is floating charge state
The step of suspend mode number of units of the direct current output value of flow module to determine every group of rectification module；
The step of every group of rectification module is subjected to suspend mode in turn according to determining number of units；And
Rectification module is controlled when the floating charge state exits or detect the disturbed condition of the floating charge state exits suspend mode
The step of,
The condition that the floating charge state exits includes when quick condition is timed to and accumulator fills state,
The disturbed condition of the floating charge state includes：Rectification module failure, interconnection switch closes a floodgate, suspend mode is turned off manually, exchange is cut
Unit exception and direct current output value are changed beyond booting threshold value and predetermined hold-time, the predetermined time is 1~5 minute,
In the step of every group of rectification module is carried out suspend mode in turn according to determining number of units, the rectification module delay of suspend mode is closed
It closes, the delay time is 1~5 minute.
2. the rectification module dormancy control method of transformer station direct current system according to claim 1, which is characterized in that according to
The direct current output value of every group of rectification module determines that the step of suspend mode number of units of every group of rectification module meets：In the rectification for determining number of units
After module suspend mode, the fairing to work in every group of fairing works within the scope of Optimal load coefficient.
3. the rectification module dormancy control method of transformer station direct current system according to claim 2, which is characterized in that according to
The step of suspend mode number of units of the direct current output value of every group of rectification module to determine every group of rectification module further includes setting dormancy parameter,
The setting dormancy parameter includes setting shutdown threshold value and booting threshold value, wherein the shutdown threshold value refers to that rectification module is controlled
The corresponding direct current output value of suspend mode is carried out, the booting threshold value, which refers to that rectification module is controlled, exits the corresponding direct current output of suspend mode
Value.
4. the rectification module dormancy control method of transformer station direct current system according to claim 3, which is characterized in that described
The mode of connection is that two electricity three fill the mode of connection, and the number of units of every group of rectification module is three, and minimum operation number of units is two, according to every
If the direct current output value of group rectification module is less than the shutdown threshold value, controls and start a rectification module suspend mode.
5. the rectification module dormancy control method of transformer station direct current system according to claim 3, which is characterized in that described
The mode of connection is that two electricity two fill the mode of connection, and the number of units of every group of rectification module is four, and minimum operation number of units is two, described true
The number of units for determining the rectification module of suspend mode is one or two, if the direct current output value of every group of rectification module is less than the shutdown threshold
Value then controls one or two rectification module suspend mode.
6. the rectification module dormancy control method of transformer station direct current system according to claim 4 or 5, which is characterized in that
The shutdown threshold value is the direct current output value corresponding to the load factor 30%~40% of every group of rectification module, and the booting threshold value is
Direct current output value corresponding to the load factor 70~80% of every group of rectification module.
7. the rectification module dormancy control method of transformer station direct current system according to claim 1, which is characterized in that also wrap
Include the step of being adjusted to the suspend mode number of units of fairing according to the direct current output value detected in real time.
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| CN101488670A (en) * | 2009-02-20 | 2009-07-22 | 中兴通讯股份有限公司 | Electric power system control method and apparatus |
| CN104468134A (en) * | 2014-12-02 | 2015-03-25 | 国家电网公司 | Method for improving efficiency of communication power supply system |
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| CN101488670A (en) * | 2009-02-20 | 2009-07-22 | 中兴通讯股份有限公司 | Electric power system control method and apparatus |
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